how to solve ordered pair

Question

how can i solve this equation 10x-7y=-6, 5x+7y=81  to ordered pair

Answer 1

1) 10x - 7y = -6

2) 5x + 7y = 81

add_____________

      15x = 75

x = 75/15 = 5

using eq(2):

5(5) + 7y = 81

y = 8

check using eq(1):

10(5) - 7(8) = -6

50 - 56 = -6

-6 = -6

ordered pair is (5,8)

Answer 2

Which ordered pair is a solution of the equation y = 10x?

 

A.

(6, 60)

 

B.

(8, 90)

 

C.

(8, 70)

 

D.

(10, 80)

 

Answer 3

y=6x+9